144331881 has 4 divisors (see below), whose sum is σ = 192442512. Its totient is φ = 96221252.

The previous prime is 144331871. The next prime is 144331897. The reversal of 144331881 is 188133441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144331881 - 2²⁶ = 77223017 is a prime.

It is a super-2 number, since 2×144331881² = 41663383745996322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144331841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24055311 + ... + 24055316.

It is an arithmetic number, because the mean of its divisors is an integer number (48110628).

Almost surely, 2^144331881 is an apocalyptic number.

It is an amenable number.

144331881 is a deficient number, since it is larger than the sum of its proper divisors (48110631).

144331881 is an equidigital number, since it uses as much as digits as its factorization.

144331881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48110630.

The product of its digits is 9216, while the sum is 33.

The square root of 144331881 is about 12013.8204165037. The cubic root of 144331881 is about 524.5506431616.

The spelling of 144331881 in words is "one hundred forty-four million, three hundred thirty-one thousand, eight hundred eighty-one".